Origin of the name GWRTHIGERN.
Etymology of the name GWRTHIGERN.
Meaning of the baby name GWRTHIGERN.

GWRTHIGERN. Welsh
name which Yonge renders "excelling king." Other critics
make it "Vir Regalis,
man prince," from Welsh gwr = "man" + theyrn
(Tigernos)
= "a prince." (Irish Version of the Historia Britonum of
Nennius, Todd-Herbert,
1848). The Latinized form is Vortigern;
the Irish Gortigern; Old
English Wyrtgeorn.

Gwrthigern, excelling king, is
a Silurian prince of doubtful fame. Through Latinism we know him
as Vortigern... (History of Christian Names, Yonge, 1884)